If you want corporations to embrace the notion of federated identity, wouldn't it require more than simple "look at me" interoperability demos and for all the vendors in this space to create some publicly available notion of "reference architecture" above and beyond what exists in Project Liberty?

Relying on a novel technology called federated search, WorldWideScience. org gives science information consumers a single entry point for searching far-reaching science portals in parallel, with only one query, saving time and effort.